Photonics and LED Lighting News

Artificial optical materials could allow cheaper, flatter, more efficient detectors for night vision and other uses

A new way of taking images in the mid-infrared part of the spectrum, developed by researchers at MIT and elsewhere, could enable a wide variety of applications, including thermal imaging, biomedical sensing, and free-space communication.

Posted on 26 April 2018 | 7:28 pm

World's smallest optical implantable biodevice

Japanese researchers have described a new implantable device no bigger than the width of a coin that can be used to control brain patterns. The device, reported in AIP Advances, converts infrared light into blue light to control neural activity, and is the smallest and lightest wireless optical biodevice yet reported.

Posted on 26 April 2018 | 11:01 am

Team shows tiny frequency combs are reliable measurement tools

In an advance that could shrink many measurement technologies, scientists at the National Institute ofStandards and Technology (NIST) and partners have demonstrated the first miniaturized devices thatcan generate desired frequencies, or colors, of light precisely enough to be traced to an internationalmeasurement standard.

Posted on 25 April 2018 | 5:00 pm

Researchers create precision optical components with inkjet printing

Researchers have developed an inkjet printing technique that can be used to print optical components such as waveguides. Because the printing approach can also fabricate electronics and microfluidics, it could advance a variety of devices such as optical sensors used for health monitoring and lab-on-a-chip devices that integrate and automate multiple laboratory functions onto a small circuit, or chip.

Posted on 25 April 2018 | 2:23 pm

Quantum dots enable faster, easier photon detection, more secure data

A team of researchers including U of A engineering and physics faculty has developed a new method of detecting single photons, or light particles, using quantum dots.

Posted on 25 April 2018 | 12:20 pm

New thermal coatings for spacecraft and satellites developed using metamaterials

A team of researchers, which includes the University of Southampton, have developed new technology which could prompt a significant change for a spacecraft or satellite.

Posted on 25 April 2018 | 11:52 am

Dispute about terahertz photoresponse in graphene results in a draw

Physicists at MIPT and their British and Russian colleagues revealed the mechanisms leading to photocurrent in graphene under terahertz radiation. The paper published in Applied Physics Letters ends a long-lasting debate about the origins of direct current in graphene illuminated by high-frequency radiation, and also sets the stage for the development of high-sensitivity terahertz detectors. Such detectors have applications in medical diagnostics, wireless communications and security systems.

Posted on 25 April 2018 | 10:22 am

3-D nanoprinting facilitates communication with light

At Karlsruhe Institute of Technology (KIT), researchers have developed a flexible and efficient concept to combine optical components in compact systems. They use a high-resolution 3-D printing process to produce tiny beam-shaping elements directly on optical microchips or fibers and, hence, enable low-loss coupling. This approach replaces complicated positioning processes that represent a high obstacle to many applications today. The scientists present their concept in Nature Photonics.

Posted on 24 April 2018 | 12:22 pm

Nanoparticle breakthrough could capture unseen light for solar energy conversion

An international team of scientists has demonstrated a breakthrough in the design and function of nanoparticles that could make solar panels more efficient by converting light usually missed by solar cells into usable energy.

Posted on 23 April 2018 | 3:00 pm

Delivering VR in perfect focus with nanostructure meta-lenses

If wearing a virtual reality or augmented reality headset is ever to become commonplace, hardware manufacturers will need to figure out how to make the devices small and lightweight while ensuring their images are sharp and clear. Unfortunately, this task faces a key limitation in optics: Conventional lenses are curved glass objects that focus different wavelengths of light in different locations, which would show viewers blurry images. As a result, pretty much anything with a lens – from tiny smartphone cameras to large-scale projectors – uses multiple lenses, which add weight, thickness and complexity, increasing cost.

Posted on 23 April 2018 | 2:07 pm

High-power laser system generates ultrashort pulses of light covering a large share of the mid-infrared spectrum

Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of health. Researchers led by Ferenc Krausz at the Laboratory for Attosecond Physics (LAP) – a joint venture between Ludwig-Maximilians-Universität (LMU) and the Max Planck Institute for Quantum Optics (MPQ) in Munich – want to use brilliant infrared light to study molecular disease markers in much greater detail, for example to facilitate early stage cancer diagnosis. The team has developed a powerful femtosecond light source which emits at wavelengths between 1.6 and 10.2 micrometers. This instrument should make it possible to detect organic molecules present in extremely low concentrations in blood or aspirated air.

Posted on 23 April 2018 | 2:04 pm

Study recommends strong role for national labs in 'second laser revolution'

A new study calls for the U.S. to step up its laser R&D efforts to better compete with major overseas efforts to build large, high-power laser systems, and notes progress and milestones at the Department of Energy's Berkeley Lab Laser Accelerator (BELLA) Center and other sites.

Posted on 20 April 2018 | 4:32 pm

Integrating optical components into existing chip designs

Two and a half years ago, a team of researchers led by groups at MIT, the University of California at Berkeley, and Boston University announced a milestone: the fabrication of a working microprocessor, built using only existing manufacturing processes, that integrated electronic and optical components on the same chip.

Posted on 19 April 2018 | 8:04 pm

Ultrafast electron oscillation and dephasing monitored by attosecond light source

Collaborative research team of Prof. Jun Takeda and Associate Prof. Ikufumi Katayama in the laboratory of Yokohama National University (YNU) and Nippon Telegraph and Telephone (NTT) have reported petahertz electron oscillation. The periodic electron oscillations of 667-383 attoseconds (10-18 of a second) is the fastest that has ever been measured in direct time-dependent spectroscopy in solid-state material.

Posted on 19 April 2018 | 11:26 am

From insulator to conductor in a flash

In recent decades, computers have become faster and hard disks and storage chips have reached enormous capacities. But this trend cannot continue forever. Physical limits are preventing silicon-based computer technology from attaining additional speed gains. Researchers are optimistic that the next era of technological advancements will start with the development of novel information-processing materials and technologies that combine electrical circuits with optical ones. Using short laser pulses, a research team led by Misha Ivanov of the Max Born Institute in Berlin, together with scientists from the Russian Quantum Center in Moscow, has shed light on the extremely rapid processes taking place within these novel materials. Their results appear in Nature Photonics.

Posted on 17 April 2018 | 10:36 am

When nuclei catch up with electrons

In an attosecond study of the H2 molecule, physicists at ETH Zurich found that for light atomic nuclei, as contained in most organic and biological molecules, the correlation between electronic and nuclear motions cannot be ignored.

Posted on 17 April 2018 | 9:28 am

Novel microscope concept can reduce radiation dose a thousand-fold

A concept for a novel X-ray microscope promises three-dimensional images of delicate objects like biological cells using a thousand times less damaging radiation than conventional methods. The novel microscope would allow to image whole cells at high resolution in their native environment, without freezing, cutting or staining them. DESY scientists Pablo Villanueva-Perez, Saša Bajt and Henry Chapman from the Center for Free-Electron laser Science (CFEL) present their concept in the journal Optica. The simulation study yields a bright perspective for the planned upgrade of DESY's storage ring PETRA III to a next generation X-ray source, PETRA IV.

Posted on 13 April 2018 | 1:24 pm

One string to rule them all

Strain can be used to engineer unusual properties at the nanoscale. Researchers in Tobias Kippenberg's lab at EPFL have harnessed this effect to engineer an extremely low-loss nanostring. When plucked, the string vibrates for minutes with a period of a microsecond (equivalent to a standard guitar note playing for a month). Using it as an ultrasensitive microphone, the researchers hope to be able to detect the sound of photons in a laser beam. The work is published in Science.

Posted on 13 April 2018 | 12:06 pm

Tiny probe can see and take body temperatures

University of Adelaide researchers have invented a world-first tiny fibre-optic probe that can simultaneously measure temperature and see deep inside the body.

Posted on 12 April 2018 | 11:04 am

Deep learning transforms smartphone microscopes into laboratory-grade devices

Researchers at the UCLA Samueli School of Engineering have demonstrated that deep learning, a powerful form of artificial intelligence, can discern and enhance microscopic details in photos taken by smartphones. The technique improves the resolution and color details of smartphone images so much that they approach the quality of images from laboratory-grade microscopes.

Posted on 11 April 2018 | 11:01 am

New light technique could result in less intrusive, more effective diagnosis for patients

A new method of using light to scan the human body, developed by researchers at the University of St Andrews, could result in less intrusive and more effective diagnosis for patients. The work is the result of a collaboration between researchers from the Schools of Physics and Astronomy, Biology, Medicine and the Scottish Oceans Institute at the University.

Posted on 10 April 2018 | 1:40 pm

Hard X-ray flash breaks speed record

Reactions in solar panels, catalytic converters, and other devices are governed by the quick motion of electrons. To capture the movement of these electrons, scientists use pulses of extremely high energy x-rays. The challenge is making the pulses short enough to get a good look at the electrons. Now, the shortest-ever pulses of hard x-rays were produced using two methods developed at SLAC's Linac Coherent Light Source. The pulse duration is just a few hundred attoseconds long, or billionths of a billionth of a second. It set a record for hard x-rays produced by free-electron lasers.

Posted on 10 April 2018 | 1:08 pm

Physicists explore a safe alternative to X-ray security scanners

A team of physicists at the University of Sussex are developing the science to create a safe and efficient 'paint' that can reveal, with terahertz (THz) radiation, the contents of luggage or objects hidden in clothing.

Posted on 10 April 2018 | 12:51 pm

Iridescent photonic cellulose, mimicking the structural color of insects, with optical applications

The bright colors of some butterflies, beetles or birds are not due to the presence of pigments that selectively absorb light, but due to the so-called structural coloration. Structural coloration occurs on surfaces with a nanostructure with dimensions similar to those of the wavelength of the incident light (typically below the micron). These ordered nanostructures are known as photonic crystals. There is a great interest in providing cellulose, the most abundant polymer in earth, biocompatible and biogradable, with these structures, which can offer new optical and electric functionalities.

Posted on 10 April 2018 | 11:26 am

Phononic SEIRA—enhancing light-molecule interactions via crystal lattice vibrations

A study published in Light: Science & Applications opens new avenues for fundamental studies of vibrational strong coupling, as well as for the development of novel infrared sensors for chemical recognition of very small amounts of molecules. The interaction of light and matter at the nanoscale is a key element for many fundamental studies and technological applications, ranging from light harvesting to the detection of small amounts of molecules.

Posted on 10 April 2018 | 10:11 am

Low bending loss waveguide opens the avenue to downsizing of 3-D photonic integrated circuits

Femtosecond laser direct writing is a promising technology for the fabrication of photonic integrated chips mainly due to its intrinsic capability of three-dimensional (3-D) prototyping in transparent substrates. Currently, the difficulty in inducing large refractive index changes smoothly distributed in the laser-irradiated regions is the major obstacle for producing compact photonic integrated circuits (PICs). Recently, researchers in China proposed a solution to suppress the bend loss of the waveguide at small radii of curvatures by more than one order of magnitude, opening a new avenue to downsizing of 3-D photonic integrated circuits. Their work, titled "Suppression of bend loss in writing of three-dimensional optical waveguides with femtosecond laser pulses," was published in Science China Physics, Mechanics & Astronomy.

Posted on 10 April 2018 | 9:57 am

New device modulates light and amplifies tiny signals

Imagine a single particle, only one-tenth the diameter of a bacterium, whose miniscule jiggles induce sustained vibrations in an entire mechanical device some 50 times larger. By taking clever advantage of the interplay between light, electrons on the surface of metals, and heat, researchers at the National Institute of Standards and Technology (NIST) have for the first time created a plasmomechanical oscillator (PMO), so named because it tightly couples plasmons—the collective oscillations of electrons at the surface of a metal nanoparticle—to the mechanical vibrations of the much larger device it's embedded in.

Posted on 9 April 2018 | 8:37 pm

Fluorescent dye could enable sharper biological imaging

Fluorescence imaging is widely used for visualizing biological tissues such as the back of the eye, where signs of macular degeneration can be detected. It is also commonly used to image blood vessels during reconstructive surgery, allowing surgeons to make sure the vessels are properly connected.

Posted on 9 April 2018 | 11:03 am

What are legal issues presents in the block chain technology?

A digital database that is containing wide range of data records and distributed on the area of network all over the world. This block chain technology has a powerful cryptography technique. This technique can protect data from human error, editing, and tempering. The recorded data of blockchain technology will save in blocks. The blocks are ...

Posted on 9 April 2018 | 10:15 am

Photonic communication comes to computer chips

With novel optoelectronic chips and a new partnership with a top silicon-chip manufacturer, MIT spinout Ayar Labs aims to increase speed and reduce energy consumption in computing, starting with data centers.

Posted on 6 April 2018 | 1:50 pm

Twisting laser light offers the chance to probe the nano-scale

A new method to sensitively measure the structure of molecules has been demonstrated by twisting laser light and aiming it at miniscule gold gratings to separate out wavelengths.

Posted on 5 April 2018 | 2:43 pm

Make Money The Easy Way

If you told people a few years ago that cryptocurrency would become one of the most popular currency forms cross the world and people would be using it for various purposes then nobody would have believed you however the truth is cryptocurrency like Clear Coin have gained a lot of popularity and people all across ...

Posted on 2 April 2018 | 9:58 am

Enhance Your Skills With These Ramps

If you love to skateboard and you enjoy the activity then you need to understand that it’s important for you to stay responsible which is why you should consider investing in a skateboard ramp. Although some people choose not to invest in a skateboard ramp because they believe it’s expensive they need to understand that ...

Posted on 24 March 2018 | 6:11 am

Use This Hack To Become The Best

Ever since smartphones have come into play more and more people are getting used to the idea of Mobile gaming and there are so many games that you can download that you will never get bored. Recently traffic Rider has gained a lot of popularity not only because it is a lot of fun to ...

Posted on 24 March 2018 | 5:39 am

Even More Great Umbrellas for the Beach

The summer season is fast approaching, and people are finding ways in order for them to beat the heat of the sun, while enjoying the great outdoors. This is often the case when you go to the beach, where it’s often extra sunny yet windy at the same time. With that said, the perfect thing ...

Posted on 20 March 2018 | 6:40 am

Things you need to know about Lightning Bolt Cleaning Services

To those who are looking for carpet cleaning in Irvine services that you can trust, one of these is Lightning Bolt Carpet and Upholstery Cleaning is the perfect one for you. This is because they make it a point to be thorough and more detail-oriented, while using techniques that are not just efficient, but are ...

Posted on 19 March 2018 | 3:08 pm

Prevent Your Business From Going Bankrupt

Anyone can need money at any moment in life. Most of the time we are prepared but sometimes, it’s really a critical phase in regards to money. It could be due to any reason, maybe your payment is due, or the money you were depended on is late, or your salary check is late. There ...

Posted on 18 March 2018 | 7:12 pm

Now You Can Make The Most Of This Technology

There are a number of people who believe that cryptocurrency is unsafe and it is a very complicated form of currency that they can’t really use. The truth, however, is cryptocurrency is just as simple as internet banking and it is a lot safer. Firstly you don’t have to worry about converting your cryptocurrency into ...

Posted on 18 March 2018 | 5:12 am

Get Money When It Is Most Needed

It is true, apart from providing you the financial help, payday loans can help you in much more ways. The first and foremost ones are, they can be utilized in an emergency, like medical treatments, renovations, school/college fees, getting something better and much more. It is also utilized to pay your bills, like credit card ...

Posted on 17 March 2018 | 7:02 pm

A look at the Best Adjustable Dumbbells for 2018

There are a lot of things that you have to put into consideration when it comes to choosing the best adjustable dumbbells you will use for your home gym. With that said, this article will help you to pick the best out of the many brands available today. All of these dumbbells come with a ...

Posted on 16 March 2018 | 10:29 am